Start by: Finding the speed as the block leaves the horizontal ramp. Use kinematics to find how long it would take an object to accelerate 1.9 m, distance from the track to the ground, then use that time and the distance 4.61 m to find the block's speed as it leaves the ramp. Hope that helps a lil.
Have you tried using a combination of Kirchoff's voltage and current laws? I tried it and got three equations and three unknowns. But its crazy to solve. I doubt its the right way, but maybe you can give it a shot?
How about Laplace transformations? Find the transfer function for capacitor...
Maybe this will help?
http://imgcash2.imageshack.us/img234/59/momentcoupleva5.jpg
You can take moment about any point, and you'd still get FD.
I just suck at explaining:smile:
K then, good luck
"All I see is a turning force created by the two propellers, and I feel that the force required to combat that turning force... would be different depending upon how far this counter force is applied from the propellers"
*Actually, no, the moment couple caused by the propellers can be...
Hi,
You're prolly thinking in terms of 'what force P is required to counteract the moment couple at the end of the boat'. This is right, but I find the most systematical way to think of this is that every force contributes a moment, and the sum of all these moments about some reference point...
Hi Ratio,
I'm having trouble understanding some of your questions, but when dealing with statics problems, I usually just do the following: set force and moment equilibrium equations and solve.
Force equilibrium in X gives n'o meaningful results so we skip
FOrce equlibrium in Y tells...
For part a, voltage is induced in the coil only if there is a change in magnetic flux. (Recall that emf induced is equal to the rate of change of flux). SO in other words, the alternating current in the power lines is why there would be voltage in the coils in the first place.
So no, AC would...
Hi Dan,
You're right. The concept of field lines and flux density is all really abstract. Its not meant to be literal when they say flux density B is the number of field lines per unit area. (Since you don't really measure field lines in numbers; its measured with units tesla). Its just so...
Sup flood, this is what I got:
F_y equilibrium gives: B + C = 90g
Moment equilibrium about B gives: t = (C - 60g)/ 7.5g,
Where B and C are the reactions at B and C, and t is the time after X and Y start moving.
Recall that the reactions are given by:
B + C = 90g
I figured that...
That's all really good advice. I'll try it and see what I can come up with. Thanks.
//Oh I realized something. My working was really wrong. I shouldn't have taken the normal to be horizontal cause the wall of the cone is slanted hahah oops.
So as the ball spirals downwards, is it valid to...
Hi! Please follow the link; its a guy juggling balls in an inverted cone. What he does is he uses the cone as a surface, and he rolls the balls around him in circles. ITs really entertaining so this shouldn't be too much of a chore.
I thought I'd post it here because it demonstrates simple...